// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_MESSAGE_CENTER_MESSAGE_CENTER_TRAY_H_
#define UI_MESSAGE_CENTER_MESSAGE_CENTER_TRAY_H_

#include "base/macros.h"
#include "base/observer_list.h"
#include "base/strings/string16.h"
#include "ui/message_center/message_center_export.h"
#include "ui/message_center/message_center_observer.h"
#include "ui/message_center/message_center_tray_delegate.h"
#include "ui/message_center/notifier_settings.h"

namespace ui {
class MenuModel;
}

namespace message_center {

class MessageCenter;
class MessageBubbleBase;
class MessagePopupBubble;
class QuietModeBubble;

// Implementation found with each supported platform's implementation of
// MessageCenterTrayDelegate.
MessageCenterTrayDelegate* CreateMessageCenterTray();

// Class that observes a MessageCenter. Manages the popup and message center
// bubbles. Tells the MessageCenterTrayHost when the tray is changed, as well
// as when bubbles are shown and hidden.
class MESSAGE_CENTER_EXPORT MessageCenterTray : public MessageCenterObserver {
public:
    MessageCenterTray(MessageCenterTrayDelegate* delegate,
        message_center::MessageCenter* message_center);
    ~MessageCenterTray() override;

    // Shows or updates the message center bubble and hides the popup bubble.
    // Returns whether the message center is visible after the call, whether or
    // not it was visible before.
    bool ShowMessageCenterBubble();

    // Hides the message center if visible and returns whether the message center
    // was visible before.
    bool HideMessageCenterBubble();

    // Marks the message center as "not visible" (this method will not hide the
    // message center).
    void MarkMessageCenterHidden();

    void ToggleMessageCenterBubble();

    // Causes an update if the popup bubble is already shown.
    void ShowPopupBubble();

    // Returns whether the popup was visible before.
    bool HidePopupBubble();

    // Toggles the visibility of the settings view in the message center bubble.
    void ShowNotifierSettingsBubble();

    // Creates a model for the context menu for a notification card.
    scoped_ptr<ui::MenuModel> CreateNotificationMenuModel(
        const NotifierId& notifier_id,
        const base::string16& display_source);

    bool message_center_visible() { return message_center_visible_; }
    bool popups_visible() { return popups_visible_; }
    MessageCenterTrayDelegate* delegate() { return delegate_; }
    const message_center::MessageCenter* message_center() const
    {
        return message_center_;
    }
    message_center::MessageCenter* message_center() { return message_center_; }

    // Overridden from MessageCenterObserver:
    void OnNotificationAdded(const std::string& notification_id) override;
    void OnNotificationRemoved(const std::string& notification_id,
        bool by_user) override;
    void OnNotificationUpdated(const std::string& notification_id) override;
    void OnNotificationClicked(const std::string& notification_id) override;
    void OnNotificationButtonClicked(const std::string& notification_id,
        int button_index) override;
    void OnNotificationDisplayed(const std::string& notification_id,
        const DisplaySource source) override;
    void OnQuietModeChanged(bool in_quiet_mode) override;
    void OnBlockingStateChanged(NotificationBlocker* blocker) override;

private:
    void OnMessageCenterChanged();
    void NotifyMessageCenterTrayChanged();
    void HidePopupBubbleInternal();

    // |message_center_| is a weak pointer that must live longer than
    // MessageCenterTray.
    message_center::MessageCenter* message_center_;
    bool message_center_visible_;
    bool popups_visible_;
    // |delegate_| is a weak pointer that must live longer than MessageCenterTray.
    MessageCenterTrayDelegate* delegate_;

    DISALLOW_COPY_AND_ASSIGN(MessageCenterTray);
};

} // namespace message_center

#endif // UI_MESSAGE_CENTER_MESSAGE_CENTER_TRAY_H_
